Question

According to Einstein's photoelectric equation, the graph of kinetic energy of the photoelectron emitted from the metal versus the frequency of incident radiation gives a straight line graph whose slopе ______.

Options

• Depends on the nature of the metal only.

• Depends on the intensity of the incident radiation only.

• Depends on the nature of the metal and also on the intensity of incident radiation.

• Is same for all metals and independent of the intensity of the incident radiation.

Answer 1

According to Einstein's photoelectric equation, the graph of kinetic energy of the photoelectron emitted from the metal versus the frequency of incident radiation gives a straight line graph whose slopе is same for all metals and independent of the intensity of the incident radiation.

Explanation:

Einstein's equation: KE = hν − ϕ

The slope of KE vs frequency graph = Planck's constant (h) , a universal constant, same for all metals and independent of intensity.